Electrical plug



April 23, 1929- R. H. OLLEY 1,710,269

ELECTRI CAL PLUG Filed Oct. 13, 1927 FIGJ I NVEN TOR. 2 a 21 i MAW/M 22ATTORNEYS.

Patented Apr. 23, 1929.

UNITED STATES PATENT OFFICE.

RAYMOND n. OLLEY, or SYRACUSE, new YORK, ASSIGNOB T0 cnovsrtnmnscourany, or SYRACUSE, NEW YORK, A CORPORATION or new "roux.

ELECTRICAL PLUG.

Application filed October 13, 1.927. Serial No. 225,909.

This invention relates to electric plugs and plug receptacles and hasfor 1ts ob ect a plug which is particularly simple and economical inconstruction and consists of a small number of compactly arranged .partswhich are held assembled by a single fastening member.

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure 1 is a longitudinal sectional view, partly in elevation, of thisplug, the contiguous portion of a plug receptacle being also shown.

Figure 2 is a sectional View, partly broken away, of parts of the plugshown in Figure 1, the component parts being shown as separated.

Figure 3 is an elevation, partly broken away, of a plug showing thelocking means.

Figures 4 and 5 are, respectively, plan Views of the blocks ofinsulation which support and retain the plug terminals in position.

Figures 6 and 7 are, respectively, a lon itudinal sectional view and aplan view 0 a modified form of one of the sections of the plug.

This plug comprises generally, a case consisting of tubular sections,one telescoping within the other, plug terminals having wire engaginends or binding devices associated therewit supporting and retainingmeans for the plug terminals, the supporting and retaining means beingslidably mounted in the case or the sections thereof and the plugterminals being slidably mounted in the supporting and retaining means,and means for locking the sections of the case and the parts within thesame in assembled relation.

1 and 2 are, respectively, the tubular sections of the case, the section1 telescoping within the section 2, the section 1 fitting within asocket S and the section 2 having a nipple for connection to a handle orother support through which the service wires extend. The service wiresextending into the section 2 through the nipple 3.

4 designates the plug terminals and 5 is a grounding terminal. The plugterminals 4 are supported and retained in position by blocks ofinsulation located, respectively in the sections 1, 2, there being oneblock in each section, and the blocks being slidable into the sectionsand the terminals slidable into the blocks.

6 designates the block of insulation in the section 1, this being formedwith passages 7 therethrough in which the plug terminals 4 are located.The block 6 is located in the section 1 by an internal shoulder in thesection 1, this shoulder being here shown as in the form of an inwardlyextending lug 8 formed in the section 1 and fitting a complementalrecess 9 in the block, the recess '9 opening through the inner end ofthe block and terminating short of the outer end. The closed outer endprovides a shoulder for abutting against the shoulder 8 and limiting theinward movement of the block 6 and hence determining the location of theblock 6. The lug 8 is formed with a passage 10 in which the groundingterminal 5 is located.

11 designates the block within the section 2. This is also formed withpassages for the terminals 4 or the wire receiving ends thereof and alsowith a. passage 12 for receiving the wire receiving end of the groundterminal 5. This block 11 also having an axial non-circular recess 13which receives a projection 14 on the block 6. The recess 13 breaksthrough the walls of the terminal passages in the block 11 so that therecess 13 together with the passages in which the wire receiving ends ofthe terminals 4 are located, constitute a slot. The terminals 4 are heldfrom endwise displacement by shoulders 15 thereon interposed between theblocks and these shoulders are located in recesses or countersinks 16formed in the blocks or one of them. The shoulders are non-circular orhexagonal and the recesses also are correspondingly shaped. Also, theends of the passages 7 for the plug terminals in the block 6 are formedwith countersinks for receiving interfitting projections 17 on the block11.

The block 11 slidably fits within the bore of the section 2 and abutsagainst an annular shoulder 18 which limits the inward movement of theblock and thus determines the position thereof.

The inner or wire receiving ends of the plug terminals 4 are preferablyformed with axially extending bores 19 for receiving the ends of thewires and in which the wires are soldered although as seen in Fi uresband 7, these bores may receive threa ed bmdmg screws20 located inrecesses 21 in the block 22 col nding to the block 11. v J

The means for holding the sections 1, 2 and the parts contained therebyin assembled relation is located within the section 1 and operable oraccessible through the open end thereof. This means as here shown is awedge 23' which is operated into and out of wedging position by anoperating member here shown as a screw 24 extending lengthwise throughthe block 6 with its head toward the outer end of the section 1, thescrew threading through the wedge and the wedge having a cam or inclinedsurface at one side coacting at 25 with a similarly inclined planesurface on the block 6.

Obviously, during tightening of the screw which threads into the wedge,the wedge due to the inclined surfaces will be forced laterally intosnug engagement with the inner annular face of the section 1, this innerannular face being smooth or free from projections or obstructions.

The section 1 is formed with a slot 26 for permitting the Wedge toengage the inner Wall of the section 2. Preferably, the annular wall ofthe section 2 and of the wedge nut coacting therewith are slightlybeveled.

In assembling, the service wires are passed through the nipple 3 and theblock llthreaded on the wires. The block 6 is placed in the section 1through the outer end thereof until it abuts against the shoulder andthe plug terminals 4. and grounding terminal 5 placed in positiontherein and also, the

wedge nut threaded on the screw 22 with the wedge in the slot 26. Thewires are then attached to the proper terminals 4, 5 and the block 11moved along down to the wires into a position against the end of thesection 1 and the sections 1 and 2 then brought together and the screw24 tightened, the screw 24 and the wedge nut being the only fasteningmeans required to hold all parts assembled except when the bindingscrews for the wires are used as shown'in Figure 6.

The section 1 is provided with a suitable external shoulder 28 fitting acomplemental internal groove 29 in the section 1 for holding thesections from relative rotation. The section 1 is also provided withanother ex ternal shoulder 30 for fitting a complemental groove in thesocket members in order to bring terminals of like plurality of the plugand socket into engagement.

The socket members may be of any suitable form, size and constructionand is formed with a suitable body 31 of insulation for fitting into thetubular section 1 and carrying socket terminals 32 for receiving thepronged ends of the plug terminals 4.

What I claim is:

1. An electric plug including a case com- 1,71o,2ee

prising two tubular sections,-one telescoping into the other, the outersection having an unobstructed bore for receiving the inner sectiontelescoping thcreinto, and means located entirely within the sectionsfor securing them together, said means including an operating memberaccessible through the open outer end of the inner section.

2. An electric plug including a case comprising two tubular sections,one telescoping into the other, the outer section having anunobstructedbore for receiving the inner section telescoping thereinto, and meanslocated entirely within the sections for securing them together, saidmeans comprising a wedge carried by the inner section and coacting withthe inner smooth bore of the outer section, and an operating member forthe wedge accessible through the open outer end of the inner section.

3. An electric plug including a case having tubular telescopingsections, a block of insulation slidably mounted in the inner sectionand having passages therethrough, plug terminals extending through saidpassages and provided with means for engaging the block to hold themfrom sliding entirely through the passages and locating them relativelyto the block, a block of insulation slidably fitting the outer sectionand having wire passages therethrough, the wire passages being arrangedto receive the inner wire engaging ends of the plug terminals, and meansfor holding the sections of the case in assembled relation and therebyholding the blocks of insulation and the plug terminals in position.

4. An electric plug including a case having tubular telescopingsections, a block of insulation slidably mounted in the inner sectionand having passages therethrough, plug terminals extending through saidpassages and provided with means for engaging the block to hold themfrom sliding entirely through the passages and locating them relativelyto the block, a block of insulation slidably fitting the outer sectionand having wire passages thcrethrough, the wire passages being arrangedto receive the inner wire engaging ends of the plug terminals, one ofthe blocks of insulation having a projection and the other having arecess for receiving the projection when the parts are assembled, andmeans for holding the sections of the case in assembled relation andthereby holding the blocks of insulation and the plug terminals inposition.

5. An electric plug comprising a case having tubular telescopingsections, a block of insulation slidably mounted in the inner sectionand having passages therethrough, plug terminals extending through saidpassages and provided with means for engaging the block to hold themfrom sliding entirely through the passages and locating them relawireengagin tively to the block, a block of insulation slidably fitting theouter section and having wire passages therethrough, the wire passagesbeing arranged to receive the inner wire en gaging ends of the plug.terminals, the block of insulation within the inner section having anaxial projection, and the block within the outer section having a recessfor receiving said projection, and means for holding the sections of thecasein assembled relation and thereby holding the blocks of insulationand the plug terminals in position.

6. An .electric plug comprising a case having tubular telescopingsections, a block of insulation slidably mounted in the inner sectionand having passages therethrough,

plug terminals extending through said pas-.

sages and provided with means for engaging the block to hold them fromsliding entirely through the passages and locating them relatively tothe block, a blockof insulation slidably fitting the outer section andhaving wire passages therethrough, the wire passages being arranged toreceive the inner ends of the plug terminals, the block wit in the outersection abutting against the end of the inner section of the case whenthe parts are assembled, and means for holding the sections of the casein assembled relation and thereby holding the block of insulation and:the plug terminals 1n position.

7 An electric plugcomprising a case having tubular telescoping sections,a; block of insulation slidably mounted in the inner section and havingpassages therethrough, plug terminals extent ing through said passagesand provided with means tor engaging the block to hold them from slidingentirely through the passages and locating them relatively to the block,a block of insulation slidably fitting the outer section and having wirepassages therethrough, the wire passages being arranged to receive theinner wire engagin g ends of the plug terminals, the blocks having aninterfitting recess and projection, and the block within the outersection of the case abutting against the end of the inner section of thecase when the parts are assembled, and means for holding the section'sof the case in assembled relation and thereby holding the blocks ofinsulation and the plug terminals in position. I i

8. An electric plug comprising a case having tubular telescopingsections, a single block of insulation mounted in'each section, plugterminals slidably mounted in'the block in the inner section, the blockinthe outer section normally holding the terminals from displacement,and means carried by the block in the inner section for locking thesections together.

9. An electric plug comprising a case hav- .ing tubular telescopingsections, terminal,

means within the inner section, for holding the sections to ether andthe parts therein in an assemble relation, said holding means.

comprising a wedge coacting with the inner face of the outer section anda Wedge operating member accessible through the outer end of the innersection.

11. An electric plug comprising a case havin tubular sections, onetelescoping into the ot er, a block of insulation mounted in eachsection and slidably mounted therein, the blocks having aligned passagestherethrough, terminals mounted in the passages and having shoulderslocated between the blocks for holding the terminals from displacement,and means for holding the sections together.

12. An electric plug comprising a case having tubular sections, onetelescoping into the other, a block of insulation mounted in eachsection and slidably mounted therein, the blocks having aligned passagestherethrough, terminals mounted in the passages and having shoulderslocated between the blocks for holding the terminals from displacement,a shoulder for locating, the position of the block in the inner section,the block in the outer section abuttingagainst the inner end ofthe innersection, and the outer section having a shoulder for locating the blocktherein, andmeans carried by the block within the inner section forsecuring the sections together.

In testimony whereof, I have hereunto signed my name, at Syracuse, inthe county of Onondaga and in the State of New York, this 10th day ofOctober, 1927.

RAYMOND H. OLLEY.

